Flight History
The aircraft, a Reims Aviation Cessna F177 RG, departed Dresden at 15:41 UTC on a private VFR flight to Egelsbach without a flight plan. A technical issue prevented the landing gear from retracting, so it remained extended throughout the flight. Radar data recorded the aircraft north of Lager Hammelburg at 17:41:52 UTC on a heading of approximately 263°, and at 17:51:38 UTC on a heading of about 235°. At 17:57 UTC, the aircraft impacted the Rottenberg at an elevation of 1460 ft MSL, resulting in severe destruction with wreckage scattered over about 100 meters. A search was initiated the next day after the aircraft failed to arrive, and it was located near Hösbach using an active mobile phone onboard.
Weather Conditions
The pilot obtained a weather briefing at 14:42 UTC from the Luftfahrtberatungsstelle Südost. The briefing indicated an occlusion extending from Kassel/Fritzlar to the Odenwald, with rain showers, cloud bases between 1500 ft and 2000 ft, and horizontal visibility around 10 km outside showers. Over the Thuringian Forest, cloud bases were expected at 1500 ft, with an overcast reported at 200 ft AGL at the Schmücke station. The pilot was advised to route via Hof/Bayreuth. At the accident site, conditions included light to moderate rain, horizontal visibility between 2 km and 5 km, and cloud bases between 800 ft and 1300 ft MSL. The accident site at 1400 ft MSL was intermittently within clouds. The freezing level was at approximately 7500 ft, with moderate icing possible above. Witnesses reported poor visibility, rain, and fog (IMC conditions).
Aircraft Information
The aircraft was a Reims Aviation Cessna F177 RG (serial number 0017, built 1971), a single-engine high-wing monoplane with retractable tricycle landing gear. It had 2600 total operating hours and a maximum takeoff mass of 1270 kg, powered by a Continental IO-360 engine. Operated under a non-commercial category, the last annual inspection was on May 5, 2000, at 2517 hours, including a 200-hour check, pitot-static test, compass compensation, and transponder adjustment. Equipment included two COM radios, two NAV radios, an ADF (declared defective), a marker, a transponder (KT-76), and a UHF-NAV unit. The transponder required an encoding altimeter for Mode C altitude reporting, but that mode was not activated. The autopilot (Century IIB) status was unknown. Center of gravity and mass were within limits.
Pilot Information
The pilot held a commercial pilot license for single-engine piston land aircraft up to 2000 kg, first issued on October 16, 1990, and valid until October 15, 2001. He also had an instrument rating with a minimum decision height of 200 ft, valid until October 15, 2000. Total flight experience was unknown (personal logbook missing); he had 89 hours on the aircraft type. Instrument flight hours were unknown. Toxicological and alcohol tests were negative.
Investigation Findings
The investigation determined that due to the weather—low clouds, rain, and fog—the pilot had to progressively lower altitude to maintain visual contact for the VFR flight. Before striking the Rottenberg at 1460 ft MSL, the aircraft had overflown obstacles at about 1740 ft MSL. The extended landing gear did not affect the chosen altitude. The aircraft's VFR-only equipment precluded a legal transition to IFR flight. The reason the pilot continued the flight under those conditions could not be determined from available evidence.